io requires packaging dependency but it is not specified in setup.py

[marwan116]

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Hi there, I am a new user of pandera - I did a pip install pandera[all] in a fresh environment using python 3.8.6.
and then I ran the quick start script

import pandas as pd
import pandera as pa

# data to validate
df = pd.DataFrame({
    "column1": [1, 4, 0, 10, 9],
    "column2": [-1.3, -1.4, -2.9, -10.1, -20.4],
    "column3": ["value_1", "value_2", "value_3", "value_2", "value_1"],
})

# define schema
schema = pa.DataFrameSchema({
    "column1": pa.Column(int, checks=pa.Check.less_than_or_equal_to(10)),
    "column2": pa.Column(float, checks=pa.Check.less_than(-1.2)),
    "column3": pa.Column(str, checks=[
        pa.Check.str_startswith("value_"),
        # define custom checks as functions that take a series as input and
        # outputs a boolean or boolean Series
        pa.Check(lambda s: s.str.split("_", expand=True).shape[1] == 2)
    ]),
})

validated_df = schema(df)
print(validated_df)

• and I got this error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/marwansarieddine/.pyenv/versions/pandera_demo/lib/python3.8/site-packages/pandera/__init__.py", line 5, in <module>
    from .decorators import check_input, check_io, check_output, check_types
  File "/Users/marwansarieddine/.pyenv/versions/pandera_demo/lib/python3.8/site-packages/pandera/decorators.py", line 21, in <module>
    from . import errors, schemas
  File "/Users/marwansarieddine/.pyenv/versions/pandera_demo/lib/python3.8/site-packages/pandera/schemas.py", line 12, in <module>
    from packaging import version
ModuleNotFoundError: No module named 'packaging'

It seems to me in the setup.py file that packaging (https://pypi.org/project/packaging/) has to be added as a dependency perhaps under the io (given I see packaging imported in test_io - but its also imported in schemas - so I am not sure)

[cosmicBboy]

thanks for pointing this out @marwan116! I just noticed this bug myself, lemme cut a new bugfix version 0.5.1 to resolve this issue

[cosmicBboy]

@marwan116 just released https://pypi.org/project/pandera/0.5.1/

let me know if this fixes the issue!

[cosmicBboy]

fixed in version 0.5.1 https://github.com/pandera-dev/pandera/releases/tag/v0.5.1

[marwan116]

@cosmicBboy I apologize, I never followed up on this - but it looks like it is working now - thanks